diff --git a/docs/plans/PROGRESS.md b/docs/plans/PROGRESS.md
index a766d09..9a8bd65 100644
--- a/docs/plans/PROGRESS.md
+++ b/docs/plans/PROGRESS.md
@@ -149,3 +149,29 @@ Running Gradle task 'assembleDebug'... 28.7s
 
 解读：静态分析零告警，561 项全量测试通过，debug APK 构建成功；
 `pubspec.lock` 已还原，无依赖变更，未安装或操作真机。
+
+## 2026-10-21 K98.2 修复 feed 更新触发 build 期通知
+
+- 已从最新 `origin/develop` 创建 `fix/k98.2-feed-build-notify`。
+- PlayerPage 的 feed 更新改为帧后调度，同一帧多次变化继续由 PlayerLogic 合并。
+- PlayerLogic 在非 idle 调度阶段延后 feed 通知与 PageController 跳页，并给延迟通知去重。
+- HomeLogic.onDramaChanged 在 build/layout/paint 阶段改为帧后通知。
+- 已补 build 阶段 updateFeed、最终 PageController 位置及 HomeLogic 延后通知回归测试。
+
+门禁原始输出：
+
+```text
+$ dart analyze lib test
+Analyzing lib, test...
+No issues found!
+
+$ flutter test --no-pub
+00:55 +563: All tests passed!
+
+$ flutter build apk --debug
+Running Gradle task 'assembleDebug'... 26.4s
+✓ Built build/app/outputs/flutter-apk/app-debug.apk
+```
+
+解读：静态分析零告警，563 项全量测试通过，debug APK 构建成功；
+`pubspec.lock` 已还原，无依赖变更，未安装或操作真机。
diff --git a/lib/pages/home/home_logic.dart b/lib/pages/home/home_logic.dart
index ae4310f..826749e 100644
--- a/lib/pages/home/home_logic.dart
+++ b/lib/pages/home/home_logic.dart
@@ -1,6 +1,7 @@
 // Author: fruit.com.cn
 
 import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
 
 import '../../core/data/models/drama.dart';
 import '../discover/discover_types.dart';
@@ -22,6 +23,7 @@ class HomeLogic extends ChangeNotifier {
   bool drawerOpen = false;
   bool detailOpen = false;
   bool videoImmersive = false;
+  bool _dramaNotifyScheduled = false;
   bool _disposed = false;
 
   void notify() {
@@ -120,7 +122,17 @@ class HomeLogic extends ChangeNotifier {
 
   void onDramaChanged(Drama drama) {
     currentDrama = drama;
-    notify();
+    if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.idle) {
+      notify();
+      return;
+    }
+    if (_dramaNotifyScheduled || _disposed) return;
+    _dramaNotifyScheduled = true;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _dramaNotifyScheduled = false;
+      if (!_disposed) notify();
+    });
+    SchedulerBinding.instance.scheduleFrame();
   }
 
   void onImmersiveChanged(bool value) {
diff --git a/lib/pages/player/player_logic.dart b/lib/pages/player/player_logic.dart
index 463f180..debe265 100644
--- a/lib/pages/player/player_logic.dart
+++ b/lib/pages/player/player_logic.dart
@@ -3,6 +3,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
 import 'package:provider/provider.dart';
 
 import '../../core/data/models/drama.dart';
@@ -108,6 +109,8 @@ class PlayerLogic extends ChangeNotifier {
   bool _latestResetToFirst = false;
   bool _feedUpdateRunning = false;
   bool _hasPendingFeed = false;
+  bool _deferredFeedNotifyScheduled = false;
+  int _feedJumpSerial = 0;
   Future<void> _feedUpdateFuture = Future<void>.value();
 
   /// [start] 是否已经跑过：没跑过时 session/pages 还是 late 未初始化，
@@ -259,7 +262,7 @@ class PlayerLogic extends ChangeNotifier {
     if (dramas.isNotEmpty) pageDrama = dramas.first;
     if (nextQueue.length == 0) {
       session.setRouteVisible(false);
-      notify();
+      _notifyAfterFrameIfNeeded();
       return;
     }
     final keepIndex =
@@ -275,7 +278,7 @@ class PlayerLogic extends ChangeNotifier {
         preloadIndex: nextVisibleIndex(keepIndex),
       );
       _jumpToFeedPage(keepIndex);
-      notify();
+      _notifyAfterFrameIfNeeded();
       return;
     }
     await _replaceSession(
@@ -303,7 +306,7 @@ class PlayerLogic extends ChangeNotifier {
     final nextSession = _createSession(factory, coordinator);
     session = nextSession;
     nextSession.setRouteVisible(active && visibleIndices.isNotEmpty);
-    notify();
+    _notifyAfterFrameIfNeeded();
     await previous.close();
     if (revision != feedRevision || !identical(session, nextSession)) return;
     _jumpToFeedPage(targetIndex);
@@ -312,13 +315,32 @@ class PlayerLogic extends ChangeNotifier {
 
   void _jumpToFeedPage(int index) {
     if (!_started) return;
-    if (pages.hasClients) {
+    final serial = ++_feedJumpSerial;
+    if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.idle &&
+        pages.hasClients) {
       pages.jumpToPage(index);
       return;
     }
     WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (_disposed || serial != _feedJumpSerial || !_started) return;
       if (pages.hasClients) pages.jumpToPage(index);
     });
+    SchedulerBinding.instance.scheduleFrame();
+  }
+
+  void _notifyAfterFrameIfNeeded() {
+    if (_disposed) return;
+    if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.idle) {
+      notify();
+      return;
+    }
+    if (_deferredFeedNotifyScheduled) return;
+    _deferredFeedNotifyScheduled = true;
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      _deferredFeedNotifyScheduled = false;
+      if (!_disposed) notify();
+    });
+    SchedulerBinding.instance.scheduleFrame();
   }
 
   /// 服务端续看位置：进播放页时取一次，用于"定位到上次那一集的那一秒"。
diff --git a/lib/pages/player/player_view.dart b/lib/pages/player/player_view.dart
index 5ed0578..9f23d17 100644
--- a/lib/pages/player/player_view.dart
+++ b/lib/pages/player/player_view.dart
@@ -139,11 +139,17 @@ class _PlayerPageState extends State<PlayerPage>
     if (widget.homeMode &&
         widget.feedDramas != null &&
         (feedChanged || channelChanged)) {
-      logic.updateFeed(
-        widget.feedDramas!,
-        keepDramaId: channelChanged ? null : logic.currentDramaId,
-        resetToFirst: channelChanged,
-      );
+      final feedDramas = widget.feedDramas!;
+      final keepDramaId = channelChanged ? null : logic.currentDramaId;
+      final resetToFirst = channelChanged;
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (!mounted) return;
+        logic.updateFeed(
+          feedDramas,
+          keepDramaId: keepDramaId,
+          resetToFirst: resetToFirst,
+        );
+      });
     }
     logic.onPageUpdated(oldWidget);
   }
diff --git a/test/home/home_logic_test.dart b/test/home/home_logic_test.dart
index f9c2427..c23a029 100644
--- a/test/home/home_logic_test.dart
+++ b/test/home/home_logic_test.dart
@@ -1,5 +1,6 @@
 // Author: fruit.com.cn
 
+import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:fruitshorts/core/data/models/drama.dart';
 import 'package:fruitshorts/pages/discover/discover_types.dart';
@@ -121,6 +122,40 @@ void main() {
     logic.dispose();
   });
 
+  testWidgets('should_defer_drama_notification_when_changed_during_build', (
+    tester,
+  ) async {
+    final logic = HomeLogic(dramas);
+    var notifications = 0;
+    var immediateNotifications = -1;
+    var changed = false;
+    logic.addListener(() => notifications++);
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: ListenableBuilder(
+          listenable: logic,
+          builder: (context, _) {
+            if (!changed) {
+              changed = true;
+              logic.onDramaChanged(dramas[1]);
+              immediateNotifications = notifications;
+            }
+            return const SizedBox.shrink();
+          },
+        ),
+      ),
+    );
+
+    expect(immediateNotifications, 0);
+    expect(tester.takeException(), isNull);
+    expect(logic.currentDrama.id, 'city');
+    await tester.pump();
+    expect(notifications, 1);
+    expect(tester.takeException(), isNull);
+    logic.dispose();
+  });
+
   test('should_map_onto_root_tabs_when_my_page_actions_fire', () {
     final logic = HomeLogic(dramas);
 
diff --git a/test/player/player_logic_test.dart b/test/player/player_logic_test.dart
index 3abc840..dea2fcf 100644
--- a/test/player/player_logic_test.dart
+++ b/test/player/player_logic_test.dart
@@ -236,6 +236,7 @@ void main() {
       logic.dispose();
       await _drain(logic);
     });
+
   });
 
   group('history writes', () {
@@ -618,6 +619,68 @@ void main() {
       logic.dispose();
       await _drain(logic);
     });
+
+    testWidgets(
+      'should_defer_feed_update_side_effects_when_called_during_build',
+      (tester) async {
+        final factory = _RecordingFactory();
+        final initial = [_drama('a'), _drama('b'), _drama('c')];
+        final latest = [_drama('d'), _drama('c'), _drama('a')];
+        final logic = _logic(FakeWatchHistory());
+        logic.attach(
+          PlayerPage(
+            drama: initial.first,
+            initialIndex: 0,
+            homeMode: true,
+            feedDramas: initial,
+          ),
+          isMounted: () => true,
+        );
+        await tester.runAsync(() async {
+          logic.start(
+            factory: factory.create,
+            coordinator: PlaybackCoordinator(),
+          );
+          await _drain(logic);
+        });
+        expect(logic.currentDramaId, 'a');
+        expect(logic.session.active, isNotNull);
+        var updateScheduled = false;
+
+        await tester.pumpWidget(
+          MaterialApp(
+            home: ListenableBuilder(
+              listenable: logic,
+              builder: (context, _) {
+                if (!updateScheduled) {
+                  updateScheduled = true;
+                  logic.updateFeed(latest, keepDramaId: 'a');
+                }
+                return Scaffold(
+                  body: PageView.builder(
+                    controller: logic.pages,
+                    itemCount: logic.visibleIndices.length,
+                    itemBuilder: (_, index) =>
+                        ColoredBox(color: Colors.black, key: ValueKey(index)),
+                  ),
+                );
+              },
+            ),
+          ),
+        );
+        expect(tester.takeException(), isNull);
+        expect(logic.pages.hasClients, isTrue);
+
+        await tester.pump();
+        await tester.pump(const Duration(milliseconds: 100));
+        await tester.pumpAndSettle();
+
+        expect(tester.takeException(), isNull);
+        expect(logic.queue.entryAt(2).drama.id, 'a');
+        expect(logic.pages.page, closeTo(2, 0.01));
+        logic.dispose();
+      },
+    );
   });
 
   group('lifecycle', () {